package org.qfbl.netty.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {
    // 当通道就绪时就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
//        super.channelActive(ctx);
        System.out.println("clent " + ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello server: 喵", CharsetUtil.UTF_8));
    }

    /**
     * 当通道有读取事件是会触发
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
//        super.channelRead(ctx, msg);
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器恢复的消息:" + buf.toString(CharsetUtil.UTF_8) );
        System.out.println("服务器地址:" + ctx.channel().remoteAddress());

    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        System.out.println("client 发生异常");
        ctx.close();
    }
}
